Centrifugal separator.



' D. B. WESTON. CENTRIFUGAL SEPARATOR.

APPLICATION FILED NOV-15.1913.

Patented Nov. 20, 1917.

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DAVID B. WESTON, 0F SHARON, MASSACHUSETTS.

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Specification of Letters Patent.

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Patented Nov. 2%, llil "J.

Application filed November 15, 1913. Serial No. 801,154.

construction capable of practical use in con-.

tinuously separating a solid constituent suspended in the liquid, sothat the device may be. capable of doing the work commonly done bythemore cumbersome filter presses without being subject to the cloggingwhich is incident to the use of filter presses.

In general the invention comprises a rotary centrifugal receptacle whosetop and bottom respectively are provided with mlet and outlet openings,combined with means for introducin the liquid to be treated into theupper perlpheral portion of the receptacle, and means for permitting thedischarge of the clarified juice, while retaining in the receptacle thesolid content and the unclarified liquid.

The machine is especially adapted for use in extracting the sediment ordirt from cane juice and also treating sewage, sludge or other likesubstances.

In the accompanying drawings I have illustrated a convenient means ofembodying the principles of this invention in which t Figure 1 is avertical central section;

Fig. 2 is a plan view showing the bottom of the receptacle and the bafieplate; and

Fig. 3 is a detail view in elevation showing a modified 'form ofconstruction.

I have shown the invention applied to the ordinary suspended type ofgyratory receptacle, in which the receptacle a is secured to a centralgyratory rotary shaft a. The top a of the receptacle is of annular formto cover the peripheral portion of the receptacle leaving-the centeropen. The bottom a of the receptacle is also of annular form, serving toclose the peripheral portion and rests upon a central spider a whichoccupies the central opening, leaving spaces between its arms for theescape of the clarified juice, when the machine is running, and for thedischarge of the solid matter when the machine is stopped. The bottom ispreferably provided, adjacent to the central opening, with an outwardlyand downwardly flared lip or flange a. A series of vertical radial wingsa insure high speed rotation of the liquid content.

The liquid to be treated is introduced throughthe opening in the top ofthe receptacle by means of a supply pipe b arranged todeliver the liquidtoward the outer, upper portion of the receptacle. To further insure themovement of the inflowing liquid to the peripheral wall of thereceptacle, 1 provide in the upper portion of the receptacle, adj acentto the inlet pipe, an annular deflector plate 0, whose outer edge isseparated a substantial distance from the peripheral wall of thereceptacle. To prevent the possibildirectly to the outlet in the bottom,I provide an annular baflie plate 03 which extends inwardly beyond theperiphery of the out let opening in the bottom, so that all liquidescaping through the bottom of the receptaclemust pass around theoutside of the baffle plate, between the latter and the outside wall.The flange a; being flared outwardly allows the escaping liquid to passoutside of the retaining flange e of the surrounding curb or casing e,and also allows the flange or lip e to be located slightly outside ofthe inner edge of the bottom a bounding the discharge opening. 7

The annular plate d rests upon angle plates or ledges 05 secured inpairs on opposite sides of the wings a. As shown in Fig. 2, the bafieplate (Z is made with radial slots extending inward from its outer edgeto re ceive the inwardly projecting portions of the wings. Forconvenience in manufacture, the baflfle plate is made in segmentalsections which are bolted together by means of slotted fish plates (1after the sections have been placed in position.

Since the balfle plate in its normal operative position wouldinterferewith the discharging of the solid matter through the bottom, itrests removably upon the ledges d and may be raised to a positionimmediately beneath the deflector 0, where hooks D are provided fordetachably supporting it out of the way.

In practice after the machine has been started, the liquid to be treatedis admitted through the supply pipe 6 and flows directly toward theupper part of the peripheral wall, over which it accumulates in avertical layer. The centrifugal force throws the heavy solid contenttoward the outer wall,

, ity of any unclarified liquid from passing lltl and when a sufiicientamount of liquid has accumulated to fill the annular space above theannular bottom, the light or clarified liquid begins to escape betweenthe arms of the spider a and owing to the centrifugal force, falls inthe direction indicated by the arrow, outside of the flange c of thecurb. This operation continues until the solid matter has accumulated tothe capacity of the machine, when the machine is stopped, the bafiieplate 03 is raised to inoperative position beneath the deflector and theattendant scoops out the solid matter which falls through the centralopening in the curb e to any suitable receptacle beneath. The

clarified liquid is drawn ofl through the outlet 6 of the curb.

In Fig. 3, I have shown'a modified arran'gement in which the bottomorfloor a of the receptacle is provided with a series of small apertures aforming outlets for the clarifiedliquid below the baffle, plate d. The

line of these outlet holes may be covered by adeflector or guard anarranged so as to throw into the outer casing or curb the escapingliquid. In this case, the bailie plate a! is detachably suspended bymeans of hooks 03 so that when it is desired to discharge the solidmatter, the baflie plate may be dropped upon the bottom a by releasingthe hooks 03 and in this position cover the liquid outlet holes andprevent their being clogged when the solid matter is scraped down fromthe vertical wall toward the central opening in the receptacle.

What I claim is:

1. The combination of the centrifugal receptacle having an imperforateouter wall.

provided with openings at top and bottom, a series of vertical wingsarranged in the peripheral portion of the receptacle, an inlet pipearranged to deliver the liquld to be treated into the upper peripheralportion of the receptacle, an annular deflector plate arranged in theupper peripheral portion of the receptacle, a bafiie plate arranged inthe lower portion of the receptaclewith its inner edge projecting;inwardly beyond the outlet opening in t e bottom, saidbaffle plate beingremovable from its operative position in the bottom portion of thereceptacle, and means for detachably supporting said baflie plate in theupper portion of said receptacle in order to facilitate the discharge of'the solid matter through the bottom of the receptacle, substantially asdescribed.

. -2. The combinationof a centrifugal receptacle provided with top andbottom openings, a series of vertical wings arranged in the peripheralportion of said receptacle. an annular, bafiie plate provided with slotsextending inwardly from its outer edge to receive the vertical wings,said baflle plate comprising a series of segmental sections and a seriesof fish plates by which they are tion of a rotary receptacle comprisinga peripheral wall and annular top and bottom members projecting inwardlyfrom said wall to leave large central openings, an annular baflle platearranged in the upper peripheral portion of the receptacle adjacent tothe top and some distance from the peripheral wall so as to leave anannularcleara-nce space between itself and the wall, a. liquid supplypipe arranged to deliver liquid to be clarified between the annular topand said bafile plate, said baflle plate being disposed with'its outerand inner ed es respectively, extending beyond the line of axialcontinuation or projection of the discharge opening in the bottom,substantially as described.

4. In a centrifugal separator the combination of a rotary receptaclecomprising a peripheral wall and annular top and ottom members securedthereto and projecting inwardly therefrom to leave large centralopenings, a liquid supply pipe projected through the top opening withits delivery portion arranged to project beneath the top leave anannular clearance space, the inner edge of said receptacle being.extended inwardly beyond the axial pro ection or continuation of theedge of the discharge outlet in the bottom, substantially as described.

5. In a centrifugal separator the combination of a rotary receptaclecomprising a eripheral wall with top and bottom ann ar membersprojecting inwardly therefrom to leave large centralopenings, upper andlower baflle rings mounted in a peripheral portion of the receptacle soas to leave annular clearance spaces between their outer edges and theperipheral walls of the re ceptacle, the inner ed es of said baflierings being located inside t e axial projection of the edge of thedischar e opening in the bot-.

tom, substantially as escribed.

6. In a centrifugal separator the combination of a rotary receptaclecomprising a pcripheral wall, annular top and bottommembers secured tosaid wall to leave large central openings, upper and-lower baflie ringsarranged. in the peripheral portion of thereceptacle so as to leaveannular clearance spaces between their outer edges and the pe ripheralwall, a seriesof vertical win arranged in the peripheral portion of t ereceptacle, said aflie rings having .their inaaar eia ner edgesextending inside the line of the edge of the discharge opening in thebottom, the lower wing being movable from operative position in thebottom portion o d the receptacle to inoperative position in the upperportion of the receptacle, and means for supporting the lower ring insaid inoperative position for the purpose of facilitating the dischargeof the solid contents, substantially as described.

7. In a centrifugal separator the combination of a rotary centrifugalreceptacle comprising an imperforate peripheral Wall and annular top andbottom members secured thereto and leaving large central openings, asupply pipe arranged to deliver the liquid directly into the upperperipheral portion of the receptacle, a bafiering arranged in theperipheral portion of the receptacle to leave an outer clearance spacebetween itself and the eripheral Wall, the inner edge of said be o ringbeing located nearer the center pf the receptacle than the edge of theoutlet opening rounding curb provided with a large central opening andan. upwardly extending flangearound said openingsubstantially inalinement with the discharge openingtin the bottom of the rotaryreceptacle whereby the clarified liquid escaping through the bottomorifice will pass outside of said flange in the curb when the machine isoperating at normal speed while permitting the discharge of the'solidcontent from the basket during the discharge operation through thecentral opening in the bottom of said curb, substantially as described.

lln witness whereof, I have subscribed the above specification.

DAVID B. WESEGN.

in the presence oi Gnonen A. Rocnwnnn,

Gite, N. Gonnane in the bottom, a sur-

